# CJ2302 S2

**Changjing** · MOSFETs · SOT-23

CJ2302 S2 from Changjing, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | GATE | input | Gate terminal of the N-channel MOSFET, with the datasheet's gate-source voltage limit VGS of ±8 V. |
| 2 | SOURCE | passive | Source terminal of the MOSFET, with the datasheet's continuous source-drain (diode conduction) current rating IS of 0.6 A. |
| 3 | DRAIN | passive | Drain terminal of the MOSFET, with the datasheet's drain-source voltage rating VDS of 20 V and continuous drain current ID of 2.1 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Gate-threshold voltage | VGS(th) | 0.65 | 0.95 | 1.2 | V | VDS =VGS, ID =50µA | 2 |
| Gate-body leakage | IGSS | -100 |  | 100 | nA | VDS =0V, VGS =±8V | 2 |
| Drain-source on-resistance | rDS(on) |  | 0.045 | 0.06 | Ω | VGS =4.5V, ID =3.6A | 2 |
| Drain-source on-resistance | rDS(on) |  | 0.07 | 0.115 | Ω | VGS =2.5V, ID =3.1A | 2 |
| Diode forward voltage | VSD |  | 0.76 | 1.2 | V | IS=0.94A,VGS=0V | 2 |
| Total gate charge | Qg |  | 4 | 10 | nC | VDS =10V,VGS =4.5V,ID =3.6A | 2 |
| Turn-on delay time | td(on) |  | 7 | 15 | ns | VDD=10V, RL=5.5Ω, ID ≈3.6A, VGEN=4.5V,Rg=6Ω | 2 |
| Rise time | tr |  | 55 | 80 | ns | VDD=10V, RL=5.5Ω, ID ≈3.6A, VGEN=4.5V,Rg=6Ω | 2 |
| Turn-off delay time | td(off) |  | 16 | 60 | ns | VDD=10V, RL=5.5Ω, ID ≈3.6A, VGEN=4.5V,Rg=6Ω | 2 |
| Fall time | tf |  | 10 | 25 | ns | VDD=10V, RL=5.5Ω, ID ≈3.6A, VGEN=4.5V,Rg=6Ω | 2 |
| Drain-source voltage | VDS |  |  | 20 | V |  | 1 |
| Gate-source voltage | VGS | -8 |  | 8 | V |  | 1 |
| Continuous drain current | ID |  |  | 2.1 | A |  | 1 |
| Continuous source-drain current (diode conduction) | IS |  |  | 0.6 | A |  | 1 |
| Power dissipation | PD |  |  | 0.35 | W |  | 1 |
| Operating junction temperature | TJ |  |  | 150 | ℃ |  | 1 |
| Storage temperature | TSTG | -55 |  | 150 | ℃ |  | 1 |
| Thermal resistance, junction to ambient | RθJA |  | 357 |  | ℃/W | t≤5s | 1 |

## CAD (KiCad official)

- Symbol: `CJ2302 S2`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `cj2302-s2-etched.step` / `cj2302-s2-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cj2302-s2.step` / `cj2302-s2.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Changjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586173052875259904) (3 pp, sha256 `45572d4a22e3ef85`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/cj2302-s2-datasheet.pdf)